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Finding the Fourth Proportional to 120,810.78, 166,723.56 and 67,099.88

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Solution

The fourth proportional to 120,810.78, 166,723.56 and 67,099.88 is: 92,600.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,810.78 : 166,723.56 = 67,099.88 : x
  2. Step 2: Convert to fraction form
    120,810.78/166,723.56 = 67,099.88/x
  3. Step 3: Cross multiply
    120,810.78x = 166,723.56 × 67,099.88
  4. Step 4: Simplify right side
    120,810.78x = 11,187,130,035.56
  5. Step 5: Solve for x
    x = 11,187,130,035.56/120,810.78
  6. Step 6: Final answer
    x = 92,600.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.